One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(4,5)(8,14)(9,13)(10,11)(15,16)(17,18,21,24,22,25,20,29)(19,26,28,23,27,32,30,31)(1,2)(3,8)(4,7)(5,13)(6,9)(10,14)(11,16)(12,15)(19,27)(23,31)(26,32)(28,30) involution — undirected(1,3,6,12)(2,8,9,15)(4,10,5,11)(7,14,13,16)(17,19)(18,23)(20,30)(21,28)(22,27)(24,32)(25,31)(26,29)(1,4)(3,10)(5,6)(7,13)(11,12)(14,16) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.